Electrical distribution system



Feb. 14, 1939. w. H. FRANK 2,146,813

ELECTRICAL DISTRIBUTION SYSTEM Filed Aug. 27, 1837 In this drawing;"

20 which may be obtained through suitable entrance it to th .rPatented Feb. 14, 1939 2 146 813 UNITED sTATEs PATENT OFFICE 2,148,813 ELECTRICAL DISTRIBUTION SYSTEM William H. Frank, Detroit, Mich. Application August 27, 1937, Serial No. 161,312 s Claims. (01. 247s) This application relates to electrical distribution box and the plug prongs 1| will engage the tion systems of the character shown in our Patbus bars 24, circuits being established from the cut No. 2,041,675 of May 19, 1936. bus bars to the cables 65 through the plug prongs More particularly, this application relates to a H, the fuses 13, the mating contacts 1488, and

Fig. 1 is a top plan view of a fr gm n f duct When the swing plug is swung open on its having the novel branch outlet device hereoi' hinge 6a, th circuits from th bu ba t th mounted hereon; binding posts will be broken in two places, first v Fig. 2 is a side view oi the device per so. by the disengagement of the prongs from the Fi 3 is a transverse section new bus bars and immediately thereafter by the 15 The duct hereof comprises identical sheet breaking of t t 14 3s metal casing halves having cooperating longi- The plug box 59 may be provmed with a ttudinal ed e flanges 2i Joined by easing Joining able handle and a latch means provided respecbolts 23 and containing bus bars 24, access to flv ly for manipulating the plug and for latching e duct when the plug is swung into plug- 20 in ositi n. The branch outlet device hereof, utilized for 3 the embodiment 1 rigidly securing the end of a branch circuit 25 be secured to the duct by suitable ones of the is obvious that the parts may be so designed that which may be knocked out to provide a hole to engagement pointsparts. 10

which the end of the conduit so may be secured, .It will be understood that while but one set of 30 as by means of a lock nut and bushing, w t contact parts for the plug is shown, that there posts 84 adapted to secure the terminals of the bars indicatedbranch circuit conductors or cables 85 (within NOW v n ri ed the construction herein 35 the conduit 60) with respect to contacts 66 withdisclosed, reference will be had to the claims in the Junction box 6|. These contacts are elecwhich follow to determine the protection sought trically connected to the binding posts by suitherein. able connection straps 61.

40 The end of the box 6| adjacent the contacts 1. In an electrlcal distribution system, a duct 40 l5 comprises not only the ox 89 but als s ar a terminal of a branch conductor with respect 0 mounted on bl cks i en th hi ge n means, and having a movable contact for mak- 50 end of h Swi Pl h n s 74 p j ing with the stationary contact when the plug ing through such open end. is in its contact making position, and a plug When the parts'al'e in the position of Fig. 2, prong for entering the duct entrance and engagthe movable contacts! of the swing plug will 111g th bu b the th parts being make with the stationary contacts 68 or the juncsigned th t when t plug prong 1 m engage.

2 means ment with the bus bar, the plug contact is in and engage the bus bar, means secured to the engagement with the stationary contact. duct and having a terminal binding post for se- 2. In an electrical distribution system, a duct curing a terminal conductor of a branch conhaving a bus bar therein and having an entrance ductor' with respect to the duct, the conductor tor permitting a plug prong to enter the duct entering the means through a hole in the means, and engage the bus bar. means secured to the the means having astationary contact connected duct and having a terminal binding post tor seto the binding post, and a branch plug hinged at curing a terminal of a branch conductor with one end to the means, and having a movable conrespect to the duct, the conductor entering the tact at such end for making with the stationary means through a hole in the means, the means contact when the plug is in its contact making having a stationary contact connected to the position, the plug having a plug prong at the binding post and a branch plug hinged at one end other end thereof for entering the duct entrance to the means, and having a movable contact at and engaging the bus bar therein, the parts besuch end for making with the stationary contact ing so designed that when the plug prong is in when the plug is in its contact making position, engagement-with'the bus bar, the plug contact is the plug having a plug prong at the other end in engagement with the stationary contact, the thereof for entering the duct entrance and enmeans being in the nature of a box, and the plug gaging the bus bar therein, the parts being so also being in the nature of a box, the-two boxes designed that when the plug prong is in engagebeing in registered alinement and in end to end ment with the bus bar, the plug contact is in en m nt when the plug prong is in bus bar engagement with the stationary contact. engaging position whereby the two boxes simulate 3. In an electrical distribution system, a. duct h appearance of but one box. having a bus bar therein and having an entrance I for permitting a plug prong to .enter the duct WILLIA H. FRANK. 

